<footer id="collabo_footer">
  <div class="footer-wrap">
    <div class="d-flex justify-content-around h-100">
      <div class="footer_item">
        <a href="#">
          <div class="img_wrap bg_red" id="micBtn">
            <img src="icon/icon_voice_gray.png" alt="音声">
          </div>
        </a>
      </div>
      <div class="footer_item none">
        <a href="#">
          <div class="img_wrap bg_gray" id="recordBtn">
            <img src="icon/icon_record.png" alt="録音">
          </div>
        </a>
      </div>
      <div class="footer_item">
        <a href="javascript:Coview_exitCollaboration(isDocument);">
          <div class="img_wrap bg_red">
            <img src="icon/icon_tell.png" alt="通話">
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        </a>
      </div>
    </div>
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</footer>